President Donald Trump and Republicans in Congress rolled back a gun regulation last year that would have restricted some people with mental disabilities from buying guns. Now, this story isn’t about gun control, but the law they used to erase that rule and 14 others last year. It’s a tale that goes back decades, and it starts in Kenya in the 1960s. Along the way, we’ll meet a man in a white suit and an army of used car dealers. This story is also the last episode of our second season, all about who writes the rules, who gets to unwrite them and who gets written off.

Krissy Clark is the senior correspondent for Marketplace’s Wealth & Poverty Desk, where she helps make sense of some of the most fundamental shifts happening in the U.S. economy, including the growth of the low-wage service sector and the shrinking of middle-wage, middle-class...